Cách sử dụng
The word 'doornail' is often used in idiomatic expressions such as 'dead as a doornail', which means completely lifeless and inanimate. It is used to emphasize that something or someone is no longer alive or has no feeling or vital energy left. The phrase used to have a literal meaning when nails were commonly used on doors, and a doornail was a specifically shaped nail that was hammered into a door to give added strength. However, in modern usage, the phrase has no relationship to the physical object itself and is only used to describe something as being completely dead or lifeless. So, if you hear someone saying 'dead as a doornail', they mean that something or someone is completely dead or has no energy left in them.